Metal-drawing apparatus.



PATENTED MAY 6, 1 "08.

J. T., s. & W. MOLTRUP. METAL DRAWING APPARATUS. APPLICATION FILED JUNE 23, 1902. RENEWED SEPT, 20,\1907.

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mum w 3% o O N M WW PATENTED MAY 5, 1908.

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I BNVENTOHS 4 M], zw 112% am @11 METAL DRAWING APPARATUS.

APPLICATION FILED JUNE 28 1902. RENEWED SEPT. 20, 1907.

WITNESSES Q P U R T L O M W & S T J METAL DRAWING APPARATUS. APPLICATION FILED JUNE 28, 1902. RENEWED SEPT. 20, 190

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"warn-0R5 "icinilinn s reens ilrnnr JAMES T. MOLTRUP, STEPHEN MOLTRUP, AND WILLIAM MOLTRUP, O l

BEAVER FALLS, PENN- SYLVANIA, ASSIGNORS TO @TANDARD GAUGE STEEL COMPANY, OF BEAVER FALLS, PENN SYLVANIA, A CORPORATION OF PENNSYINANIA.

hiETAL-DRAWING APPARATUS.

Application filed June 28, 1902, Serial No. 113,604. Renewed September 26, 190?.

.7 all whom if may concern:

Be it known that we, JAMES T. .lvloL'rRUP, S'ini nnx Iiloixrn'or, and WILLIAM MoL'rnUP, all of Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented ii new and useful Improvement in Metall/rawing Apparatus, of which the following is a full, clear, and exact description, reference. being had to the ncm'n'nl'mrrving drawings, forming part of this specification, in which-- Figure l is a top plan view oi. a portion of n drawing apparatus constructed in accordance-with our invention; Fig. 2 is a top plan view partly .in section showing the parts in a dill'erent position; Fig. 3 is also a top plan view partly broken away, showing the parts in the position when the gripping jaws are about to seize the end of the bar; Fig. 4 is a side elevation oi the machine shown in Fig. I) Fig. 5 is 2!,(1088-500tl0ll on the line of Fig. 2; Figs. 6 and '2" are cross-sections on the line Y l-Vl of Fig. 2, looking towards the left and right, respectively, of the machine; Fig.

is a cross-section on the line Vlll"\ lli of Fig. 1, looking toward the left, showing the carriage only.

(Eur inven't-ion relates to the drawing of metal bars or rods, and is designed to provide improved automatic apparatus which shall qu ckly and ellirientlv carry out the drawing operation. lleretofore in such processes the end of the bar or rod has usually been forged down to a smaller size so that this end may be pushed through the drawing dies and seized by the grippers which are then actu nted to pull the bar through lhe dies. in some cases the full-sized end portion of the bar has been forced through the dies far enough to enable the grippers to seize this end. in all such cases heretofore the machinery must be stopped after the end portion of the bar has been pushed through the dies, vand the grippers then clamped on this end portion and net-noted to perform the drawing.

Our invention is designed to overcome the dilliculties in these prior methods, and to provide a machine which shall operate automatically and continuously; in which the emineetions shall operate to return the parts to their original ositionnfter the drawing operation is completed; to provide means for Specification of Letters Patciit.

Patented iviay 5, 1302?.

Serial No. 398,893.

gripping the bar and pushing. its end portion; and for then grip; in t portion without stopping the more. driving mechanism having the bar then being drawn through ti 1 In the drawings 2 represents :1, i'nsssive head carried on sliding supports 3, 3 end having a central opening in which is secured the drawing dies l which may be of the usual construction. The supports 3, 3 slide on suitable guide-ways 5, 5 on the stationary frame of the machine and are connected by pivotal links 6, 6 with segmental racks 7, 7 which are pivoted in the side portions of the frame and are arranged to he swung in a horizontal plane by means of pins or teetl' cured between the upoerand 8 which are so lower plates 9 which form part of it carriage at the'haek ends of rack-liars '10 30 having horizontal teeth or pins, as shtwvn. The back end ortions oi the rack-bars proper are hung lroma cross-bar end wheels 12 moving on tracks 13 outside 01 and above the rack-bars 10.

The plates 9 extend backwards from the rack-bars and are provided with upper and lower recesses ll which receive the end portions of parallel upper andlower plates form ing a cross-head 15 which can slide. on the carriage formed at the hack ends of the rack bars. This eross-head is provided with a lnickwz-irdlv projeciingframe 16 in which. are pivoted two sets of upper and lower toggle links 17 carrying hetween them on common pivots the links 18, the front ends of which are provided with the removable jaws 19 which are preferahl; roughened to ohtain o firm grip upon the end of the liar. These toggle links are actuated by the internieslnng segmental racks 20, one of which is provided with a handle 21, and both having slots 22 engaging vertical pins 23 which form the rear pivot pins of the links carrying the gripping jaws. The frame 161s carried at its back end 3 :1 bar 24 havin wheels 25 movable upon the side portions or the frame, and secured to this cr ss-l ar is a hackwardly projecting pin 16 which in certain positions of the carriage engages a socket 27 secured to the top por-- tion of the head, the. clamping action of the socket being adiustcd by suital'ile cop bolts, as shown. This frictional connection between the corrizigocarryingthe gri 'iping jaws 11 carried upon which it moves. This frictional connection with the sliding of the grnpmg gaws relstively to its actuating niecnsnisin we consider a broadly novel feature, and an important one as it enables the machine to o crate continuously Without stoppage of the acts? atin mechanism. T e mechanism for holding the bar in p0 sitlon while the dies are forced over its end rtions consists of a. massive cross-head 28 which slides on the rear portion of the main frame and is held in its operative position by portions its the carriage thus suitable pins 29. This cross-head is supported upon wheels 30 carried on angle iron tracks secured to the side frame, the bottom of the tracks being provided with racks which are engaged by pinions 31 on a shaft 32 carried by the head and having an end hand Wheel 33. By this means the head may be drawn back to allow access to t e dies and to change the gripping mechanism, or for re airs. The cross-head 28 is provided wit 1 toggle-lever mechanism 34 which is the same as that carried on the cross-head 15, the jaws 35 being arranged to allow a bar .to be pushed through them towards the die,

but preventing rearward movement. These jaws are clamped by the' hand-operated mechanism 36 similar to that employed upon the other gripping jaws above mentioned.

The 0 eration of the above parts is as follows: Tlle raclobars 10 being actuated to move the carriage toward the dies as they move backward, the teeth or pins 8 at their back ends engage the teeth of the segmental racks 7, the parts then being in the position. shown in Fi ,1 As the carriage'continues its backwarclmovem ent, the segmental racks swing outwardly and through the links 6 draw the head 2 containing the (lies intotlio position shown in Fig. 2. In this position the grip ins; jaws on the carriage are closcto the bee. and the pin 26 is engaged with the socket 27 of the head 2. As the head. '3 is drawn iorward toward the gripping jaws of the carriage. he o erstor pushes the bar of metal a forward tllrough the head 28 and into engagement with the (lies. The oper ator thenreverses the motion of the rackbars and the carriage, and t is carriage moves forward with the bar, whil the our head 15 and its attacbedparts, inchiding. tnc

ripping jaws, are bold backvnu'd llf," the 'i'lClJlOKl between the pin 26 and its socket. moves forward, the links 6 force the head 2 with its dies baelc wardly over the end part of the bar which. grip ed in the oil the cross-heed 28 urmg this period the cross head l5 is. held seem? to the head and travels back with it. When the cross-head 15 has reached the shoulders 39 at the ends oi its guiding recesses 14, shown in Fig. l, the links 6 are passing their dead. centers and begin to draw the head for wardlv, the carriage moving with it. Dur .ing this period the operator clam s the jaws of the carriage upon tlieiorwa 'dl y protruding end of the bar by the hand. levers '21. After the segmental tracks have completed their rotation in this direction the shoulders upon the carriage engage the. oross-head 15 and draw it positively forward, the head 2 oi the dies being stationery, and having passed out of engagement with the segmental rack. The entire bar is thus drawn through the dies when the connections are thrown off, the jaws unola'mpcd and the raclbars actuated to bring the parts .bach to their original position, when the operations are repeated. The head '2 is held in its forward operative osition by shoulder or abutnients 37 upon t the strain. oil the links 6. The head 15 is moved forward or backward by the abutments at the ends of the slide-ways l4, and the racks can move in either direction 9. limited distance, deterin'ined by the length of the slide-ways lg, without moving the head '15. 38 is a toothed wheel which is driven by suitable earing" which is capable'of rotating the w feel in either direction, and by its engagement them forward and backward, as desired. The rack bars thus constitute s. rigid element connected to the sup orts oi the movable grippers, and mover. ositively in both directions by the tootbe wheels.

The advantages of our invention will be apparent to those skilled in the art. The forging down of the ends is done away with. The same machine which 0 crates to draw the bars also cots to push t e dies over the end 'ortion, and the whole operation is quick 3'- and easily carried out, and the per centage of scrap and imperfect bers reduced.

The form and arrangement of the various mechanisms, as well as the driving connections may be varied widelywitliin the scope of our invention as defined in the claims, each of which covers a separatev combination which may be used independent oi those oi" the other claims.

We claim:

1. A metal drofwing apparatus having a (lie which, is iixe'il ti/lieu active, means for shifting die to llace the 11' ion the work with the latter projecting theretlxrougli, means for holding; the work when the. die is being shitteal, and means for drawing the wort: tl'iroiw b the (lie when the latter is fixed, substantially as described.

in metal drawing; apporctus, a clamp arranged to hold the bar, a movable die, mechanism for pushing the die resrwardly the pins 8' with the rack-hers move seem-r over the end portion oi the her, meehanism for onionmtieglly stopping sziid movement a" dirend allowing ii to return to its no! nail position, and niecln'niisin For gl'l},1},)i11 f the piojrvting end portion of the inn and drawing it through the die; snhstentiully its les'vriiiied.

ineml rimming; apparatus, a clamp a d to hold the her, :2 movnhie' holloa r'eiriao'e r iing gripping; jaws, eon- Jeeiions bet 1 the carriage and. the die erirzmg'ed to puso the ie over the end portion of the her, \and means foi'stooping id novement or" the die automationlly, and retuining' it to its normal position: substantially as desr-rihed.

in metal drawing 1;;

2 lo! the bar. :1 movable hem it'x'ihfi a holhrn drawing;- die, h earn a mung gripping hints. ineehzn'nsm for toe nun I 1 "J LI'U'IlitL't) and arranged to push the die renrie die-helm waidl i' over the bar; snhstenliizillv as deem hm i zneml drawing: 1) lure-ins, n reluand then allow the die to return to its normal iiion, and mechanism for moving the 'e the nmchine is in motion:shhstantinlly esvribed.

hollow drawing die, a llltfiltillt' miri'inge he mg connevtions wirh the die and arranged to push it reznwvurdly over the end portion of the bar,

and a head slidingly mounted onlhe 2e and hrving gripping jaws arm: "-d E71 ihe nd oi the bar alter the die lorced ixarnz-imll over it; snbstzinrzziliy as desz-ribed. I

in metal drawingapparatus, ii l l'iltifllu'ti Y [or the her, :1 movable drnwin die. g ejn'iwrl misin for mining the uriingije )Uill directions and gear derives engaged by the wnri uinl roi'meeted to he die to l on-e it 1N0! the bar; substanlizllly us deseribedx M. in metal a'lrnwing apparatus, :1 holloiv containing a drawing" die, :1 movable 'e having n sliding heed carrying" gripping inns, and a detachable eonneetion between the snbstzuiii (t in etnl drawing apparatus, a chimp for the hers, a movable heed eonr'aining the drawing die, n n'iovnble earl ig'e having a sliding head thereon, (:onneetions betw en th carriage and the die-head arranged to torriseizl heed reerwardlv over the end of the bar and e detnrlmble conneetion bes iingg' head and the drawing; die; I

as described.

pnreius, a clamp l l 2 -ai mine, the grippers tht-reon hei "ii-tinned,

0 gear connections, a. movable carriage arwinged to igege and actuate said connec- 10115 to l e I Che die ovn' the head, a slide on tn, eerria and arranged to en 'ege shoulders thereon in oeri elnpositions of the parts,

said side marrying gripping jaws arranged to seize the protruding end of the bar, and a frietion connection hetWe-enthe slide and the movable drmvingdie; substantially as described.

11. in metal drawing apparatus, {L relatively stetionaly head carrying gri 'ipers arranged to clamp the bar, :1 movable head car 5, drawing dies, a carriage, mechanism for moving the *ztrriage positively toward and :lrozto the gripping head, links connecting: the die-carrying head to the toothed segmental racks, teeth upon the carriage ar ranged to eng' ge said racks, a slide upon the carriage with end stops to limit its relative movement, and grippers carried slide; substentielly described.

12. In metai drawing appereius, :1 clamp arranged to hold the bar, a movable hollow die, a mo V&i)i(. carriage having gripping 'aws arranged to seize the end of the bar, mechanisnrfor moving the carriage in one direction ei'uls. oi the rod, and allow it to return to its normal pUSitiC ll during the continued. mov ment of the carriage in the same direction; snl'istentielly as described.

13. A metal drawing apparatus having a die which is stationary Whe 1 active, :1. work- 1 holding ehnnp in rear 01 the die, and means in trout ol the ewe)? gripping the work and drawing 't be some from the clamp through the (he said lie capable of being moved rear- Wardly upon the Work and permit the latter in hont ol the (he for engagement to oro 'eot i hr the gripping means substantially as described 14'. "Li metal drawing epparatus'hztving a (he WlHCl! is stationery when active, a womlwlding rhino: at one side of the die, and

nieznis at the otl'ier side the die for grip,

ping the work and drawing the same from the ch mp through the (lie, said die capable of beim; nfired towards the Work-holding (lamp up Lhc no i; and permit the latter to i t through the die towards the gripping menus for one enient by the letter substany iis described.

15. A metal drawing apparatus having :1 die which is stationary when active, at workiolding eieinp at one 'side oi the die, means at the othe eirle of the die for gripping the Work and drawing the same from, the chimp through the die, said die capable of being moved \wrlla the workholding clamp upon by sz-t'iCl 1 ons arranged to force the (lie over the H161, by the latter,

' '16. A metal drawing-apparatusihaving a die which is stationary holding clamp till i the die, said die capable of being moved rearthe work to permit it to project through the die towards the gripping means for engageand. means for stoppin the movement of the die at a predetermined point substantially as described.

when active, a Workrear of the die, means in frontof the die for gripping the work and drawing the same from the clamp through wardly upon the work and. permit it to projeet in front of the die for engagement by the gripping means, and means for stopping the rearward movement of the die at a redetermined point substantially as descri ed.

17 A metal drawing apparatus having a die which is fixed when active, means to niove'the (lie rearwardly over the forward end portion of the work to permit it to project through the die, means for holding the work when the die is being shifted, and means for drawing the work away from the seem? work-holding means and through the die to reduce the work, substantially as described.

18. A metal drawing apparatus having a die which is fixed when active, means for shifting the die to workwith the latter rejecting theret irough, means for holding tiie work when the die is bein shifted, means to automatically stop the s ifting movement of the die when a pre determined portion of the work is projecting through it, and means through the die and away from the Worle holding means to reduce the work, substantially as descizibed.

In testimony whereof, we have hereunto set our hands.

JAMES T. MOLTRUP. STEPHEN MQL'iRUl. WILLIAM MOLT RUP.

Witnesses:

SUSIE W. RoUzEn, J. BLAINE MoGoUN.

for drawing the work place the same 11 on the I 

